X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fstdio%2Ffgetwc.c;h=aa10b818566a8f1d19af680a9d00458d101572fa;hb=e1a51185ceb4386481491e11f6dd39569b9e54f7;hp=a00c1a862babf2b0732909b77ce765cc31655888;hpb=72656157f54c47277b01ec85a6ba7c4084fea6c8;p=musl

diff --git a/src/stdio/fgetwc.c b/src/stdio/fgetwc.c
index a00c1a86..aa10b818 100644
--- a/src/stdio/fgetwc.c
+++ b/src/stdio/fgetwc.c
@@ -5,36 +5,42 @@
 
 static wint_t __fgetwc_unlocked_internal(FILE *f)
 {
-	mbstate_t st = { 0 };
 	wchar_t wc;
 	int c;
-	unsigned char b;
 	size_t l;
 
 	/* Convert character from buffer if possible */
-	if (f->rpos < f->rend) {
-		l = mbrtowc(&wc, (void *)f->rpos, f->rend - f->rpos, &st);
-		if (l+2 >= 2) {
+	if (f->rpos != f->rend) {
+		l = mbtowc(&wc, (void *)f->rpos, f->rend - f->rpos);
+		if (l+1 >= 1) {
 			f->rpos += l + !l; /* l==0 means 1 byte, null */
 			return wc;
 		}
-		if (l == -1) {
-			f->rpos++;
-			return WEOF;
-		}
-		f->rpos = f->rend;
-	} else l = -2;
+	}
 
 	/* Convert character byte-by-byte */
-	while (l == -2) {
+	mbstate_t st = { 0 };
+	unsigned char b;
+	int first = 1;
+	do {
 		b = c = getc_unlocked(f);
 		if (c < 0) {
-			if (!mbsinit(&st)) errno = EILSEQ;
+			if (!first) {
+				f->flags |= F_ERR;
+				errno = EILSEQ;
+			}
 			return WEOF;
 		}
 		l = mbrtowc(&wc, (void *)&b, 1, &st);
-		if (l == -1) return WEOF;
-	}
+		if (l == -1) {
+			if (!first) {
+				f->flags |= F_ERR;
+				ungetc(b, f);
+			}
+			return WEOF;
+		}
+		first = 0;
+	} while (l == -2);
 
 	return wc;
 }